Pyrotechnic device



G. J. SCHLADT PYROTECHNIC DEVICE Filed March 51,

March 1, 1932.

JNVENTOR. Ge DEE J- Echladn BY 7 W i I ATTORNEY vice and, more Patented Mar. 1, 1932 GEORGE J. SCHLADT, F DOVER, JERSEY rYRorEcHNIo DE ICE Applicationfiled March 31, 1931. Serial N'o. 526,662.

(GRANTED UNDER ACT OF MARCH 3, 1883, AS AMENDED @PRIL 30, 1928; 370 0. G. 757) The invention described herein may ,be manufactured and used by or for the Government for governmental purposes, without the payment to meof any royalty thereon.

This invention relates to a pyrotechnic departicularly, it has reference to a smoke shell.

The object of the invention is to provide a smoke shell which will rapidly evolve smoke and to this end the combustible materials or members of the shell are arranged so that a large surface is exposed to ignition.

A practical embodiment of the invention is illustrated in the accompanying drawings, wherein:

Fig. 1 is a longitudinal sectional view of one 'form of shell constructed in accordance with the invention;

Fig. 2 is a similar view showing an alternate arrangement for the shell of Fig. 1;

Fig. 3 is a similar view of a modified form of shell.

Referring to the drawings by numerals of reference:

There is shown in Fig. 1 a shell comprisingla cylindrical casing 5 on whose ends are adhesively secured covers 6-6 each vhaving a central aperture 7 closed by a thin cap 8 fitting over the end of the casing.

A disk 9 having a central aperture 10 closed by a thin combustible plate 11 is mounted in the casing and serves as a diaphragm to divide the casing into chambers 12 and 13. The disk is supported by means of a'ring 14 fitting in one end of the casing and serving to provide a reinforced wall for the chamber 13 in which is placed a propellant charge 15. I

A smoke producing composition in the chamber is in the form of compressed rings 1616 separated from one another by space "rings 17. A bundle of quick matches 18 is 1 placed in the opening of the rings 16 and rests on the combustible plate 11. A primer 19 positioned in the aperture 10 of the diaphram carries a quick match 20.

WVhen the shell is placed in a discharger (not shown) ignition of the propellant charge 15 will cause the shell to be projected into the air as a unit. Ignition is transmitted from the primer 19 to the quick, matches 18 and thence to the rings 16 of smoke producing The modified form of shell shown in Fig.

2 is substantially similar to that of Fig. 1. In this instance only two rings 16a of the smoke producing composition are shown and they are spaced by rings 17a from the diaphragm 9a and cover 6a, as well asfrom each other. One of the quick matches in the bundle 18a is drawn through a small aperture in the diaphragm to render it available to the flame from the propellant charge 15a.

The shell shown in Fig. 3 is also similar to the one in Fig. 1 with the exception that loose black powder 21 replaces the bundle of quick matches as an igniter and vents 22 are provided in the wall of the casing 5, preferably in line with the spa'cingbetween the rings 16?) to permit emission of the smoke. The black powder 21 constituting the igniting charge is held out of contact with the rings 16?) by means of a perforated tube 23 having a thin imperforate lining 24. This latter type of shell possesses especial merit when the unit is to be employed without being projected into the air in which case the propellant charge 15?) is either omitted or removed.

I claim:

1. A smoke shell comprising a container, a diaphragm in the container, a propellant charge on one side of the diaphragm, combustible rings on the other side of the diaphragm, means for spacing the rings, an igniter in the opening of the rings and having communication with the propellant charge, and means for venting the casing.

2. A smoke shell comprising a container,

combustible rings in the container, means for 4. A smoke shell comprising a container having apertured ends, an apertured diaphragm in the container, a propellant charge on one side of the diaphragm, combustible rings on the other side of the diaphragm, means for spacing the rings and an igniter in the opening of the rings.

5. A smoke shell comprising a container having apertured ends, an apertured diaphragm in the container, a propellant charge on one side of the-diaphragm, combustible rings on the other side of the diaphragm, means for spacing the rings and means for igniting the rings.

6. 'A smoke shell comprising'a container, a diaphragm in the container, a propellant char e on one side of the diaphragm, combusti 1e rings on the other-side of the diaphragm, means for spacing the rings, a perforated tube inv the opening of the rings, an imperforate lining in the tube, an igniter within the lining, and vents in the side walls of the conveyor. 7

7. A smoke shell comprising a container, combustible rings in the container, means for spacing the rings, a perforated tube in the opening of the rings, an imperforate lining in the tube, an igniter in the tube, and vents in the side walls of the container. GEORGE J. SGHLADT. 

